d05b750b8d
When a passive touch grab is rejected over the frame, management is punted to the frame itself, and pointer events emulated, but the attempt to transfer the grab from the GDK connection to the Clutter one fails with AlreadyGrabbed, and will fail until the Clutter connection receives the XI_TouchEnd resulting from XIRejectTouch, gotten after the XI_ButtonPress on the GDK connection. In order to bypass this shortcoming, store the current grab operation on the frame as long as the button is pressed, so it is retried once on the next motion event happening during frame dragging, that will have a recent enough timestamp to succeed. If no grabbing succeeded, the current grab operation data will be reset on GDK_BUTTON_RELEASE.